Tutor profile: Mika B.
Rewrite the following passage, correcting all the conjugation errors: "Mes amis et moi avons allés au parc quand il fait beau dehors. Il fallait que je reviens assez tôt car ma mère avais besoin de mon aide pour le dîner."
"Mes amis et moi sommes allés au parc quand il faisait beau dehors. Il fallait que je revienne assez tôt car ma mère avait besoin de mon aide pour le dîner."
Subject: Basic Chemistry
How many kilograms of NaCl are in 34 moles of NaCl?
Given that the molecular weight of Na is 23 g/mol and that of Cl is 35.5 g/mol, the molecular weight of NaCl is 58.5 g/mol. 34 moles of NaCl would be 34 times as many grams as are in one mole. 34 mol *58.5 g/mol = 1989 grams To convert grams to kilograms, divide 1989 by 1000. This gives 1.989 kg of NaCl as the final answer.
Mika was selling tickets for a Fun Fair and sold 10 more adult tickets than children's tickets and she sold twice as many senior tickets as children's tickets. Let x represent the number of children's tickets sold. Adult tickets cost $4, children's tickets cost $2, and senior tickets cost $3. Mika made $640. 1)Write an expression to represent the number of adult tickets sold. 2)Write an expression to represent the number of senior tickets sold. 3)Write an equation to represent the total ticket sales. 4)How many children's tickets were sold for the fair? How many adult tickets were sold? How many senior tickets were sold?
1) x + 10 2) 2x 3) 4(x+10) + 3(2x) + 2x = 640 simplified to 12x + 40 = 640 4) x = 50 --> 50 children's tickets x+ 10 = 60 --> 60 adult tickets 2x = 100 --> 100 senior tickets